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This is an optimized implementation of the memcpy routine that gives a
significant gain in performance for all sizes of copies on the
Qualcomm Falkor processor. A detailed rationale of the implementation
is written in a comment in the patch.
This implementation improves time for copies up to 128 bytes by up to
15% and for larger copies by up to 35% in the glibc
microbenchmark. The memcpy-random benchmark sees improvements in all
sizes in the range of 13%-18%.
Here are the full numbers extracted from the glibc microbenchmark
using the commands:
../benchtests/scripts/compare_strings.py benchtests/bench-memcpy.out \
../benchtests/scripts/benchout_strings.schema.json \
-base=__memcpy_generic length align1 align2
../benchtests/scripts/compare_strings.py benchtests/bench-memcpy-large.out \
../benchtests/scripts/benchout_strings.schema.json \
-base=__memcpy_generic length align1 align2
../benchtests/scripts/compare_strings.py benchtests/bench-memcpy-random.out \
../benchtests/scripts/benchout_strings.schema.json \
-base=__memcpy_generic max-size
Function: memcpy
__memcpy_thunderx __memcpy_falkor __memcpy_generic
Variant: default
================================================================================
length=1,align1=0,align2=0: 33.59 (-115.00%) 15.62 (0.00%) 15.62
length=1,align1=0,align2=0: 16.41 (-10.53%) 14.06 (5.26%) 14.84
length=1,align1=0,align2=0: 14.84 (0.00%) 14.84 (0.00%) 14.84
length=1,align1=0,align2=0: 15.62 (-5.26%) 14.06 (5.26%) 14.84
length=2,align1=0,align2=0: 15.62 (-5.26%) 14.06 (5.26%) 14.84
length=2,align1=1,align2=0: 15.62 (-5.26%) 14.06 (5.26%) 14.84
length=2,align1=0,align2=1: 14.84 (0.00%) 14.06 (5.26%) 14.84
length=2,align1=1,align2=1: 14.84 (-5.56%) 14.06 (0.00%) 14.06
length=4,align1=0,align2=0: 14.06 (0.00%) 14.06 (0.00%) 14.06
length=4,align1=2,align2=0: 14.06 (-5.88%) 14.06 (-5.88%) 13.28
length=4,align1=0,align2=2: 14.06 (0.00%) 14.06 (0.00%) 14.06
length=4,align1=2,align2=2: 14.06 (-5.88%) 14.06 (-5.88%) 13.28
length=8,align1=0,align2=0: 14.84 (-5.56%) 13.28 (5.56%) 14.06
length=8,align1=3,align2=0: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=8,align1=0,align2=3: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=8,align1=3,align2=3: 13.28 (-6.25%) 13.28 (-6.25%) 12.50
length=16,align1=0,align2=0: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=16,align1=4,align2=0: 13.28 (0.00%) 12.50 (5.88%) 13.28
length=16,align1=0,align2=4: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=16,align1=4,align2=4: 13.28 (-6.25%) 12.50 (0.00%) 12.50
length=32,align1=0,align2=0: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=32,align1=5,align2=0: 13.28 (0.00%) 12.50 (5.88%) 13.28
length=32,align1=0,align2=5: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=32,align1=5,align2=5: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=64,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=64,align1=6,align2=0: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=64,align1=0,align2=6: 14.06 (5.26%) 14.06 (5.26%) 14.84
length=64,align1=6,align2=6: 14.84 (-11.77%) 14.06 (-5.88%) 13.28
length=128,align1=0,align2=0: 17.19 (-4.76%) 14.84 (9.52%) 16.41
length=128,align1=7,align2=0: 16.41 (4.55%) 15.62 (9.09%) 17.19
length=128,align1=0,align2=7: 16.41 (0.00%) 14.06 (14.29%) 16.41
length=128,align1=7,align2=7: 16.41 (4.55%) 15.62 (9.09%) 17.19
length=256,align1=0,align2=0: 21.88 (-3.70%) 21.09 (0.00%) 21.09
length=256,align1=8,align2=0: 21.09 (-3.85%) 21.09 (-3.85%) 20.31
length=256,align1=0,align2=8: 20.31 (-4.00%) 20.31 (-4.00%) 19.53
length=256,align1=8,align2=8: 21.88 (-7.69%) 20.31 (0.00%) 20.31
length=512,align1=0,align2=0: 28.91 (-2.78%) 28.91 (-2.78%) 28.12
length=512,align1=9,align2=0: 30.47 (-2.63%) 30.47 (-2.63%) 29.69
length=512,align1=0,align2=9: 29.69 (0.00%) 29.69 (0.00%) 29.69
length=512,align1=9,align2=9: 28.12 (-2.86%) 28.12 (-2.86%) 27.34
length=1024,align1=0,align2=0: 44.53 (0.00%) 44.53 (0.00%) 44.53
length=1024,align1=10,align2=0: 50.00 (0.00%) 50.00 (0.00%) 50.00
length=1024,align1=0,align2=10: 49.22 (1.56%) 50.78 (-1.56%) 50.00
length=1024,align1=10,align2=10: 44.53 (-1.79%) 43.75 (0.00%) 43.75
length=2048,align1=0,align2=0: 77.34 (-1.02%) 76.56 (0.00%) 76.56
length=2048,align1=11,align2=0: 89.84 (0.00%) 89.84 (0.00%) 89.84
length=2048,align1=0,align2=11: 89.84 (0.00%) 89.84 (0.00%) 89.84
length=2048,align1=11,align2=11: 75.78 (0.00%) 75.78 (0.00%) 75.78
length=4096,align1=0,align2=0: 141.41 (-0.56%) 140.62 (0.00%) 140.62
length=4096,align1=12,align2=0: 171.09 (-0.46%) 170.31 (0.00%) 170.31
length=4096,align1=0,align2=12: 170.31 (0.00%) 170.31 (0.00%) 170.31
length=4096,align1=12,align2=12: 140.62 (0.00%) 140.62 (0.00%) 140.62
length=8192,align1=0,align2=0: 278.91 (-0.28%) 275.78 (0.84%) 278.12
length=8192,align1=13,align2=0: 338.28 (0.23%) 335.94 (0.92%) 339.06
length=8192,align1=0,align2=13: 338.28 (0.00%) 455.47 (-34.64%) 338.28
length=8192,align1=13,align2=13: 278.12 (-0.28%) 275.78 (0.56%) 277.34
length=16384,align1=0,align2=0: 535.94 (-0.15%) 531.25 (0.73%) 535.16
length=16384,align1=14,align2=0: 659.38 (0.12%) 659.38 (0.12%) 660.16
length=16384,align1=0,align2=14: 659.38 (0.00%) 657.03 (0.36%) 659.38
length=16384,align1=14,align2=14: 535.16 (0.44%) 532.81 (0.87%) 537.50
length=32768,align1=0,align2=0: 1260.94 (10.68%) 1121.88 (20.53%) 1411.72
length=32768,align1=15,align2=0: 1368.75 (10.02%) 1376.56 (9.50%) 1521.09
length=32768,align1=0,align2=15: 1333.59 (10.91%) 1373.44 (8.25%) 1496.88
length=32768,align1=15,align2=15: 1256.25 (13.96%) 1125.78 (22.90%) 1460.16
length=65536,align1=0,align2=0: 2853.91 (30.11%) 2589.06 (36.60%) 4083.59
length=65536,align1=16,align2=0: 2850.00 (30.14%) 2589.84 (36.52%) 4079.69
length=65536,align1=0,align2=16: 2853.12 (30.60%) 2589.84 (37.00%) 4110.94
length=65536,align1=16,align2=16: 2850.78 (30.07%) 2589.06 (36.49%) 4076.56
length=0,align1=0,align2=0: 15.62 (-5.26%) 16.41 (-10.53%) 14.84
length=0,align1=0,align2=0: 14.84 (-5.56%) 14.84 (-5.56%) 14.06
length=0,align1=0,align2=0: 14.84 (0.00%) 14.84 (0.00%) 14.84
length=0,align1=0,align2=0: 16.41 (-16.67%) 14.84 (-5.56%) 14.06
length=1,align1=0,align2=0: 15.62 (4.76%) 15.62 (4.76%) 16.41
length=1,align1=1,align2=0: 15.62 (0.00%) 14.84 (5.00%) 15.62
length=1,align1=0,align2=1: 14.84 (0.00%) 14.84 (0.00%) 14.84
length=1,align1=1,align2=1: 14.84 (0.00%) 14.06 (5.26%) 14.84
length=2,align1=0,align2=0: 14.84 (0.00%) 14.06 (5.26%) 14.84
length=2,align1=2,align2=0: 14.84 (0.00%) 14.06 (5.26%) 14.84
length=2,align1=0,align2=2: 14.84 (-5.56%) 14.06 (0.00%) 14.06
length=2,align1=2,align2=2: 14.84 (0.00%) 14.06 (5.26%) 14.84
length=3,align1=0,align2=0: 14.84 (0.00%) 14.84 (0.00%) 14.84
length=3,align1=3,align2=0: 14.84 (-5.56%) 14.06 (0.00%) 14.06
length=3,align1=0,align2=3: 15.62 (-11.11%) 14.06 (0.00%) 14.06
length=3,align1=3,align2=3: 14.84 (0.00%) 14.06 (5.26%) 14.84
length=4,align1=0,align2=0: 17.97 (-27.78%) 14.06 (0.00%) 14.06
length=4,align1=4,align2=0: 13.28 (5.56%) 14.06 (0.00%) 14.06
length=4,align1=0,align2=4: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=4,align1=4,align2=4: 13.28 (5.56%) 13.28 (5.56%) 14.06
length=5,align1=0,align2=0: 13.28 (5.56%) 13.28 (5.56%) 14.06
length=5,align1=5,align2=0: 14.06 (0.00%) 14.06 (0.00%) 14.06
length=5,align1=0,align2=5: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=5,align1=5,align2=5: 14.06 (-5.88%) 14.06 (-5.88%) 13.28
length=6,align1=0,align2=0: 14.06 (-5.88%) 14.06 (-5.88%) 13.28
length=6,align1=6,align2=0: 14.06 (0.00%) 14.06 (0.00%) 14.06
length=6,align1=0,align2=6: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=6,align1=6,align2=6: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=7,align1=0,align2=0: 14.84 (-11.77%) 14.06 (-5.88%) 13.28
length=7,align1=7,align2=0: 13.28 (0.00%) 14.06 (-5.88%) 13.28
length=7,align1=0,align2=7: 14.06 (0.00%) 14.06 (0.00%) 14.06
length=7,align1=7,align2=7: 14.06 (0.00%) 14.06 (0.00%) 14.06
length=8,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=8,align1=8,align2=0: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=8,align1=0,align2=8: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=8,align1=8,align2=8: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=9,align1=0,align2=0: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=9,align1=9,align2=0: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=9,align1=0,align2=9: 13.28 (0.00%) 14.06 (-5.88%) 13.28
length=9,align1=9,align2=9: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=10,align1=0,align2=0: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=10,align1=10,align2=0: 14.06 (-5.88%) 14.06 (-5.88%) 13.28
length=10,align1=0,align2=10: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=10,align1=10,align2=10: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=11,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=11,align1=11,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=11,align1=0,align2=11: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=11,align1=11,align2=11: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=12,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=12,align1=12,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=12,align1=0,align2=12: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=12,align1=12,align2=12: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=13,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=13,align1=13,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=13,align1=0,align2=13: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=13,align1=13,align2=13: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=14,align1=0,align2=0: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=14,align1=14,align2=0: 13.28 (5.56%) 13.28 (5.56%) 14.06
length=14,align1=0,align2=14: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=14,align1=14,align2=14: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=15,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=15,align1=15,align2=0: 14.06 (-5.88%) 14.06 (-5.88%) 13.28
length=15,align1=0,align2=15: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=15,align1=15,align2=15: 13.28 (0.00%) 14.06 (-5.88%) 13.28
length=16,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=16,align1=16,align2=0: 13.28 (5.56%) 14.06 (0.00%) 14.06
length=16,align1=0,align2=16: 14.84 (-11.77%) 13.28 (0.00%) 13.28
length=16,align1=16,align2=16: 13.28 (-6.25%) 12.50 (0.00%) 12.50
length=17,align1=0,align2=0: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=17,align1=17,align2=0: 14.84 (-11.77%) 12.50 (5.88%) 13.28
length=17,align1=0,align2=17: 14.84 (-5.56%) 12.50 (11.11%) 14.06
length=17,align1=17,align2=17: 14.84 (-11.77%) 12.50 (5.88%) 13.28
length=18,align1=0,align2=0: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=18,align1=18,align2=0: 13.28 (5.56%) 12.50 (11.11%) 14.06
length=18,align1=0,align2=18: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=18,align1=18,align2=18: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=19,align1=0,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=19,align1=19,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=19,align1=0,align2=19: 14.84 (-5.56%) 12.50 (11.11%) 14.06
length=19,align1=19,align2=19: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=20,align1=0,align2=0: 14.84 (-11.77%) 12.50 (5.88%) 13.28
length=20,align1=20,align2=0: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=20,align1=0,align2=20: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=20,align1=20,align2=20: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=21,align1=0,align2=0: 14.84 (-5.56%) 12.50 (11.11%) 14.06
length=21,align1=21,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=21,align1=0,align2=21: 14.84 (-11.77%) 12.50 (5.88%) 13.28
length=21,align1=21,align2=21: 13.28 (5.56%) 13.28 (5.56%) 14.06
length=22,align1=0,align2=0: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=22,align1=22,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=22,align1=0,align2=22: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=22,align1=22,align2=22: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=23,align1=0,align2=0: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=23,align1=23,align2=0: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=23,align1=0,align2=23: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=23,align1=23,align2=23: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=24,align1=0,align2=0: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=24,align1=24,align2=0: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=24,align1=0,align2=24: 14.84 (-11.77%) 12.50 (5.88%) 13.28
length=24,align1=24,align2=24: 14.06 (-5.88%) 13.28 (0.00%) 13.28
length=25,align1=0,align2=0: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=25,align1=25,align2=0: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=25,align1=0,align2=25: 14.06 (0.00%) 12.50 (11.11%) 14.06
length=25,align1=25,align2=25: 13.28 (0.00%) 13.28 (0.00%) 13.28
length=26,align1=0,align2=0: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=26,align1=26,align2=0: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=26,align1=0,align2=26: 14.06 (-5.88%) 12.50 (5.88%) 13.28
length=26,align1=26,align2=26: 14.06 (0.00%) 13.28 (5.56%) 14.06
length=27,align1=0,align2=0: 14.06 (-5.88%) 12.50 (5.88%) 13.28
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length=1856,align1=0,align2=0: 70.31 (-1.12%) 70.31 (-1.12%) 69.53
length=1856,align1=58,align2=0: 83.59 (-0.94%) 82.03 (0.94%) 82.81
length=1856,align1=0,align2=58: 178.12 (-115.09%) 82.81 (0.00%) 82.81
length=1856,align1=58,align2=58: 70.31 (-1.12%) 70.31 (-1.12%) 69.53
length=1888,align1=0,align2=0: 73.44 (-1.08%) 78.91 (-8.60%) 72.66
length=1888,align1=59,align2=0: 85.94 (0.00%) 89.84 (-4.55%) 85.94
length=1888,align1=0,align2=59: 84.38 (0.00%) 89.06 (-5.56%) 84.38
length=1888,align1=59,align2=59: 72.66 (-1.09%) 78.12 (-8.70%) 71.88
length=1920,align1=0,align2=0: 72.66 (-1.09%) 78.12 (-8.70%) 71.88
length=1920,align1=60,align2=0: 85.94 (0.00%) 89.84 (-4.55%) 85.94
length=1920,align1=0,align2=60: 85.16 (0.00%) 89.06 (-4.59%) 85.16
length=1920,align1=60,align2=60: 72.66 (-1.09%) 78.91 (-9.78%) 71.88
length=1952,align1=0,align2=0: 75.00 (-1.05%) 75.00 (-1.05%) 74.22
length=1952,align1=61,align2=0: 88.28 (0.00%) 87.50 (0.88%) 88.28
length=1952,align1=0,align2=61: 87.50 (0.00%) 88.28 (-0.89%) 87.50
length=1952,align1=61,align2=61: 74.22 (0.00%) 74.22 (0.00%) 74.22
length=1984,align1=0,align2=0: 75.00 (-1.05%) 73.44 (1.05%) 74.22
length=1984,align1=62,align2=0: 89.06 (-0.89%) 87.50 (0.88%) 88.28
length=1984,align1=0,align2=62: 87.50 (0.00%) 88.28 (-0.89%) 87.50
length=1984,align1=62,align2=62: 74.22 (0.00%) 74.22 (0.00%) 74.22
length=2016,align1=0,align2=0: 77.34 (-1.02%) 76.56 (0.00%) 76.56
length=2016,align1=63,align2=0: 91.41 (-0.86%) 90.62 (0.00%) 90.62
length=2016,align1=0,align2=63: 89.84 (0.00%) 90.62 (-0.87%) 89.84
length=2016,align1=63,align2=63: 77.34 (-1.02%) 76.56 (0.00%) 76.56
length=4096,align1=0,align2=0: 141.41 (-0.56%) 146.88 (-4.44%) 140.62
Function: memcpy
__memcpy_thunderx __memcpy_falkor __memcpy_generic
Variant: large
================================================================================
length=65543,align1=0,align2=0: 4018.75 (3.09%) 2634.38 (36.47%) 4146.88
length=65551,align1=0,align2=3: 4425.00 (-6.47%) 3134.38 (24.59%) 4156.25
length=65567,align1=3,align2=0: 2909.38 (29.95%) 3134.38 (24.53%) 4153.12
length=65599,align1=3,align2=5: 4415.62 (-6.16%) 3134.38 (24.64%) 4159.38
length=131079,align1=0,align2=0: 5765.62 (30.38%) 5240.62 (36.72%) 8281.25
length=131087,align1=0,align2=3: 8831.25 (-6.56%) 6271.88 (24.32%) 8287.50
length=131103,align1=3,align2=0: 5793.75 (29.05%) 6268.75 (23.23%) 8165.62
length=131135,align1=3,align2=5: 5806.25 (29.97%) 6259.38 (24.50%) 8290.62
length=262151,align1=0,align2=0: 11850.00 (28.91%) 10762.50 (35.43%) 16668.80
length=262159,align1=0,align2=3: 12043.80 (27.72%) 12700.00 (23.78%) 16662.50
length=262175,align1=3,align2=0: 12046.90 (27.90%) 12687.50 (24.07%) 16709.40
length=262207,align1=3,align2=5: 11984.40 (28.08%) 12678.10 (23.91%) 16662.50
length=524295,align1=0,align2=0: 24825.00 (25.00%) 24268.80 (27.34%) 33400.00
length=524303,align1=0,align2=3: 35731.20 (-6.53%) 25678.10 (23.44%) 33540.60
length=524319,align1=3,align2=0: 25893.80 (22.71%) 25725.00 (23.22%) 33503.10
length=524351,align1=3,align2=5: 25887.50 (22.86%) 25690.60 (23.45%) 33559.40
length=1048583,align1=0,align2=0: 50621.90 (0.30%) 50600.00 (0.34%) 50771.90
length=1048591,align1=0,align2=3: 53206.20 (0.54%) 51081.20 (4.51%) 53493.80
length=1048607,align1=3,align2=0: 53221.90 (0.32%) 51975.00 (2.66%) 53393.80
length=1048639,align1=3,align2=5: 53240.60 (0.36%) 51953.10 (2.77%) 53431.20
length=2097159,align1=0,align2=0: 103744.00 (-2.00%) 102447.00 (-1.00%) 102425.00
length=2097167,align1=0,align2=3: 108588.00 (-1.00%) 105159.00 (2.00%) 107606.00
length=2097183,align1=3,align2=0: 107678.00 (0.00%) 105250.00 (2.00%) 108125.00
length=2097215,align1=3,align2=5: 107906.00 (1.00%) 105841.00 (3.00%) 109475.00
length=4194311,align1=0,align2=0: 202994.00 (0.00%) 202500.00 (1.00%) 204809.00
length=4194319,align1=0,align2=3: 213350.00 (0.00%) 205997.00 (3.00%) 213384.00
length=4194335,align1=3,align2=0: 212653.00 (0.00%) 206444.00 (3.00%) 212900.00
length=4194367,align1=3,align2=5: 213044.00 (0.00%) 206084.00 (3.00%) 213847.00
length=8388615,align1=0,align2=0: 401294.00 (0.00%) 401231.00 (0.00%) 401944.00
length=8388623,align1=0,align2=3: 480872.00 (-14.00%) 406444.00 (3.00%) 422900.00
length=8388639,align1=3,align2=0: 422147.00 (0.00%) 407750.00 (3.00%) 422803.00
length=8388671,align1=3,align2=5: 442003.00 (-5.00%) 407125.00 (3.00%) 423509.00
length=16777223,align1=0,align2=0: 799809.00 (0.00%) 800000.00 (0.00%) 801756.00
length=16777231,align1=0,align2=3: 841184.00 (0.00%) 808525.00 (4.00%) 843775.00
length=16777247,align1=3,align2=0: 841166.00 (0.00%) 810147.00 (3.00%) 843147.00
length=16777279,align1=3,align2=5: 972569.00 (-16.00%) 808588.00 (4.00%) 843731.00
length=33554439,align1=0,align2=0: 1842240.00 (-0.01%) 1863590.00 (-1.17%) 1841990.00
length=33554447,align1=0,align2=3: 2103470.00 (-2.74%) 1919460.00 (6.25%) 2047440.00
length=33554463,align1=3,align2=0: 2075690.00 (-1.07%) 1930040.00 (6.02%) 2053720.00
length=33554495,align1=3,align2=5: 2110590.00 (-2.82%) 1924440.00 (6.25%) 2052650.00
Function: memcpy
__memcpy_thunderx __memcpy_falkor __memcpy_generic
Variant: random
================================================================================
max-size=4096: 44061.90 (5.85%) 38568.20 (17.59%) 46799.90
max-size=8192: 42790.90 (5.27%) 38158.90 (15.52%) 45171.50
max-size=16384: 44912.10 (2.25%) 38710.40 (15.75%) 45945.00
max-size=32768: 43577.90 (1.23%) 37975.10 (13.93%) 44120.00
max-size=65536: 44375.50 (1.04%) 38474.20 (14.20%) 44840.60
* manual/tunables.texi (Tunable glibc.tune.cpu): Add falkor.
* sysdeps/aarch64/multiarch/Makefile (sysdep_routines): Add
memcpy_falkor.
* sysdeps/aarch64/multiarch/ifunc-impl-list.c (MAX_IFUNC):
Bump.
(__libc_ifunc_impl_list): Add __memcpy_falkor.
* sysdeps/aarch64/multiarch/memcpy.c: Likewise.
* sysdeps/aarch64/multiarch/memcpy_falkor.S: New file.
* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
Add falkor.
* sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_FALKOR):
New macro.
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